JPH01313686A - Nonlubricated screw compressor - Google Patents
Nonlubricated screw compressorInfo
- Publication number
- JPH01313686A JPH01313686A JP14172688A JP14172688A JPH01313686A JP H01313686 A JPH01313686 A JP H01313686A JP 14172688 A JP14172688 A JP 14172688A JP 14172688 A JP14172688 A JP 14172688A JP H01313686 A JPH01313686 A JP H01313686A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- rotor
- thermal deformation
- casing
- bearing housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 abstract description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003292 diminished effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高圧縮比の無給油式スクリュー圧縮機に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high compression ratio oilless screw compressor.
従来の装置は、特開昭５９−９８９８８号に記載のよう
に、ケーシングに設けたロータ収納室の外周面をテーバ
状に形成し、周壁の肉厚な吸込側から吐出側に至るにし
たがりて厚くするように構成することによって、ロータ
収納室の吐出側周壁の熱変形を軽減していた。In the conventional device, as described in JP-A No. 59-98988, the outer circumferential surface of the rotor storage chamber provided in the casing is formed into a tapered shape, and the outer circumferential surface of the rotor storage chamber provided in the casing is tapered from the suction side where the circumferential wall is thick to the discharge side. By making the rotor storage chamber thicker, thermal deformation of the discharge-side circumferential wall of the rotor storage chamber is reduced.
上記従来技術では、吐出側軸受室の熱変形を考慮してお
らず、軸受室の熱変形による雄側と雌側との軸受中心間
距離の増大する問題、すなわち、ｉ−夕軸間距離が増大
する問題が生じ、タイミングギヤのバック２ツシユの増
大、ロータ間ギャップの増大を引き起す。また、軸受室
の熱変形によって、軸受嵌合部のすきまが大きくなる可
能性が出てくる。The above conventional technology does not take into account the thermal deformation of the bearing chamber on the discharge side, and the problem is that the distance between the male and female bearing centers increases due to thermal deformation of the bearing chamber. An increasing problem arises, causing an increase in the timing gear backlash and an increase in the rotor-to-rotor gap. Furthermore, thermal deformation of the bearing chamber may increase the gap in the bearing fitting portion.
本発明の目的は吐出側軸受室の熱変形を緩和することに
ある。An object of the present invention is to alleviate thermal deformation of the discharge side bearing chamber.
上記目的は、ロータ、軸受を収納する円筒と、外筒とが
一体に結合してなり二を構造となっていて、その内筒と
外筒との間に水冷ジャケットが形成されているケーシン
グにおいて、円筒上にある軸受収納部と外筒との間に、
軸受中心方向から半径方向に広がる複数のリプな介在さ
せ、軸受収納部に熱変形に対する剛性を持たせることに
より達成される。The above purpose is to provide a casing which has a structure in which a cylinder housing a rotor and a bearing and an outer cylinder are integrally connected, and a water cooling jacket is formed between the inner cylinder and the outer cylinder. , between the bearing storage part on the cylinder and the outer cylinder,
This is achieved by providing a plurality of ribs extending in the radial direction from the center of the bearing to provide the bearing housing with rigidity against thermal deformation.
オイルフリースクリユー圧縮機においては、圧縮比が高
い場合、吐出空気温度が約３２０’Ｃに達しケーシング
の熱変形量が大きく、ケーシング吐出口付近では特にそ
の傾向が顕著になる。また、吐出口に近い軸受収納室の
熱変形も無視できない程度であり、熱変形後は、雄側と
雌側との間の軸受中心間距離が増大する。前述のリプな
設けることにより軸受収納室周壁が変位しにくくなり熱
変形量を低減化でさる。一方、軸受収納室外周壁は冷却
水によって冷却されているが、上記の構成で冷却効果が
薄れることはない。In an oil-free screw compressor, when the compression ratio is high, the discharge air temperature reaches about 320'C and the amount of thermal deformation of the casing is large, and this tendency is particularly noticeable near the casing outlet. Further, the thermal deformation of the bearing storage chamber near the discharge port is not negligible, and after the thermal deformation, the distance between the bearing centers between the male side and the female side increases. By providing the above-mentioned shape, the peripheral wall of the bearing storage chamber becomes difficult to displace, and the amount of thermal deformation can be reduced. On the other hand, although the outer circumferential wall of the bearing storage chamber is cooled by cooling water, the cooling effect is not diminished with the above configuration.
以下、本発明の一実施例を第１〜８図により説明する。 An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.
オイルフリースクリユー圧縮機は第８図に示す様に、水
冷ジャケット４を有するケーシング８に設けたロータ収
納室５ａｅａｂ内に互いに噛み合う一組の雄ロータ１、
雄ロータ２を収納し、その吸込側および吐出側にＳケー
シング８およびＤカバー７がそれぞｆＬ４付けられてい
る。このＤカバー７内には、雄ロータｌの吐出側軸１ｂ
Ｋ取付けられた駆動タイミングギヤ５と、雌ロータ２の
吐出側軸ｚｂＫ取付けられた従動タイミングギヤ６とが
噛合い状態で収納されている。また前記塩ロータ１の吸
込側軸１ａには増速ギヤ９が取付けられている。As shown in FIG. 8, the oil-free screw compressor includes a pair of male rotors 1 which are engaged with each other in a rotor storage chamber 5aeab provided in a casing 8 having a water-cooled jacket 4.
The male rotor 2 is housed, and an S casing 8 and a D cover 7 are attached to the suction side and the discharge side, respectively. Inside this D cover 7, there is a discharge side shaft 1b of the male rotor l.
A drive timing gear 5 attached to K and a driven timing gear 6 attached to the discharge side shaft zbK of the female rotor 2 are housed in a meshed state. Further, a speed increasing gear 9 is attached to the suction side shaft 1a of the salt rotor 1.
上記ケーシング３は８ｇ２図に示すように内外筒３ｃ、
３ｄにより二重に構成され、この両筒８Ｇ、３ｄ間に水
冷ジャケット４が形成されている。The casing 3 has an inner and outer cylinder 3c, as shown in Figure 8g2,
3d, and a water cooling jacket 4 is formed between the two cylinders 8G and 3d.
その両筒８Ｃ１３ｄ内には誰、＊ロータ１，２およびこ
の両ロータ１．２の吐出側軸１ｂ、２ｂを支持する吐出
側軸受１２．１８軸受をそれぞれ収納する軸受収納室Ｂ
ｅ、８ｆが設けられている。Inside the two cylinders 8C13d are bearing storage chambers B that accommodate the rotors 1 and 2 and the discharge side bearings 12 and 18 bearings that support the discharge side shafts 1b and 2b of both rotors 1.2, respectively.
e, 8f are provided.
本実施例においては上記の構成に加え、水冷ジャケット
４円に軸受収納室８ ’ｅ ＋ ８ ｆと雉、雌側の外
筒３ｇ、８ｈとの間に、軸受中心方向から半径方向に広
がる複数のリプ１０を介設させる。In this embodiment, in addition to the above-mentioned configuration, there are a plurality of holes extending radially from the center of the bearing between the bearing storage chamber 8'e + 8f and the outer cylinders 3g and 8h on the female side in the water cooling jacket 4th circle. Reply 10 is interposed.
上記のような構造からなるオイルフリースクリユー圧縮
機では、雄ロータｌが増速ギヤ９を介して駆動源（図示
せず〕により回転されると、互いに噛み合うタイミング
ギヤ５．６を介して雌ロータ２が回転される。この際、
両ロータ１．２は非接触状態で回転し、この回転が続行
されるに伴つて吸込ボート（図示せず）から両ロータ１
，２および周ｉ３ａ、３ｂにより形成される圧縮室（図
示せず）に吸入された空気は圧縮され、所定の圧力まで
昇圧された後に吐出ボート１１から吐出される。In the oil-free screw compressor having the above structure, when the male rotor l is rotated by a drive source (not shown) via the speed increasing gear 9, the female rotor l is rotated via the timing gear 5.6 which meshes with each other. The rotor 2 is rotated. At this time,
Both rotors 1.2 rotate in a non-contact manner, and as this rotation continues, both rotors 1.2 are removed from the suction boat (not shown).
, 2 and the surroundings i3a, 3b, the air is sucked into a compression chamber (not shown), and is discharged from the discharge boat 11 after being compressed and raised to a predetermined pressure.
−ｅ圧縮で圧カフ ｋｇ ｆ ／ｌ＊（２）まで昇圧さ
せるオイル７リースクリユー圧縮機では圧絹比が高いた
め、吐出空気温度はａｚｏ’（３位まで上昇する。この
高温の吐出空気によってケーシング８には熱変形が生じ
るが、熱変形量は特に吐出ボー）１１付近で最も大きく
なるが、吐出ボート１１に近い吐出側の軸受収納ｘａｅ
、ａｒの熱変形も無視できない程度であり、熱変形後は
、雄側の軸受収納室８ｅと雌側軸受収納室３ｆとの中心
間距離が増大し、また、軸受収納室３ｅ、３ｆの周壁の
内径が増大する。その結果、ロータ軸１ｂ、２ｂ間の軸
間距離の増大を引き起し、タイミングギヤ５．ｔ５のバ
ックラッシュを増大させ、ま友、ロータ間のギャップを
増大させる。バックラッシュの増大はロータ接触の可能
性を高くシ、ロータ間ギャップの増大は性能の低下を引
き起す。前記リプ１０を設けることにより軸受収納Ｎ８
ｅ、８ｆが熱変形に対する剛性が増し熱変形量を低減化
できる。−方、軸受収納量８ｅ、８ｆは冷却水によって
冷却されているが、上記の構成で冷却効果が薄れること
はない。-e Pressure rises to pressure cuff kg f / l * (2) by compression In the oil 7-lease screw compressor, the pressure silk ratio is high, so the discharge air temperature rises to azo' (3rd place).This high temperature discharge air Thermal deformation occurs in the casing 8 due to this, and the amount of thermal deformation is largest especially near the discharge boat 11.
The thermal deformation of , ar is not negligible, and after the thermal deformation, the distance between the centers of the male bearing storage chamber 8e and the female bearing storage chamber 3f increases, and the peripheral walls of the bearing storage chambers 3e and 3f increase. The inner diameter of increases. As a result, the distance between the rotor shafts 1b and 2b increases, causing the timing gear 5. This increases the backlash at t5 and increases the gap between the rotors. An increase in backlash increases the possibility of rotor contact, and an increase in the inter-rotor gap causes a decrease in performance. Bearing storage N8 can be achieved by providing the lip 10.
e and 8f have increased rigidity against thermal deformation and can reduce the amount of thermal deformation. On the other hand, although the bearing storage volumes 8e and 8f are cooled by cooling water, the cooling effect is not weakened with the above configuration.
本発明によれば、軸受収納室の熱変形を低減化でき、ロ
ータ間の軸間距離の増大が防がれ、圧縮機運転中のタイ
ミングギヤのバフクラッシュの増大、ロータ間ギャップ
の増大を防止できる。According to the present invention, it is possible to reduce thermal deformation of the bearing storage chamber, prevent an increase in the distance between the rotors, and prevent an increase in buff crush of the timing gear during compressor operation and an increase in the gap between the rotors. can.
第１図は本発明の一実施例のケーシングの吐出ＩＦ４１
Ｊ１１ｔＨ受を含む面での断面図、第２図はケーシング
の両ロータ軸を含む面での断面図、第８図は本発明の無
給油式スクリュー圧縮機の組立断面図である。
■・・・雄ロータ ２・・・雄ロータ ８・・・ケ
ーシング ４・・・水冷ジャケット ５・・・タイ
ミングギヤ ６・・・タイミングギヤ ７・・・Ｄ
カバ８・・・Ｓケーシング ９・・・増速ギヤ Ｉ
Ｏ・・・リブ １１・・・吐出ボー？ １２．１
８・・・吐出側軸受 ８ｅ・・・軸受収納室 ８ｆ
・・・軸受収納富竿１図
１２図Figure 1 shows a discharge IF41 of a casing according to an embodiment of the present invention.
FIG. 2 is a sectional view of the casing in a plane including both rotor shafts, and FIG. 8 is an assembled sectional view of the oil-free screw compressor of the present invention. ■...Male rotor 2...Male rotor 8...Casing 4...Water cooling jacket 5...Timing gear 6...Timing gear 7...D
Cover 8...S casing 9...Increasing gear I
O...Rib 11...Discharge bow? 12.1
8...Discharge side bearing 8e...Bearing storage chamber 8f
...bearing storage wealth rod 1 figure 12 figure
Claims (1)
吐出側、吸込側でそれぞれ支承する軸受と、ロータ、軸
受を収納し、かつ水冷ジャケットを有するケーシングか
ら成る無給油式スクリュー圧縮機において、吐出側軸受
収納室の周壁と水冷ジャケット外周壁との間に、放射状
のリブを設けたことを特徴とする無給油式スクリュー圧
縮機。In an oilless screw compressor consisting of a male rotor and a female rotor that mesh with each other, bearings that support both rotor shafts on the discharge side and suction side, respectively, and a casing that houses the rotor and bearings and has a water cooling jacket, the discharge An oil-free screw compressor characterized in that radial ribs are provided between the peripheral wall of the side bearing storage chamber and the outer peripheral wall of the water cooling jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14172688A JPH01313686A (en) | 1988-06-10 | 1988-06-10 | Nonlubricated screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14172688A JPH01313686A (en) | 1988-06-10 | 1988-06-10 | Nonlubricated screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01313686A true JPH01313686A (en) | 1989-12-19 |
Family
ID=15298780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14172688A Pending JPH01313686A (en) | 1988-06-10 | 1988-06-10 | Nonlubricated screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01313686A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419686U (en) * | 1990-06-05 | 1992-02-19 | ||
| WO2005061900A1 (en) * | 2003-12-22 | 2005-07-07 | Mitsubishi Denki Kabushiki Kaisha | Screw compressor |
| US7779822B2 (en) * | 2007-01-12 | 2010-08-24 | Gm Global Technology Operations, Inc. | Intake assembly with integral resonators |
| US20120020824A1 (en) * | 2010-07-20 | 2012-01-26 | Paul Xiubao Huang | Roots supercharger with a shunt pulsation trap |
| JP2017106342A (en) * | 2015-12-08 | 2017-06-15 | スズキ株式会社 | Water-cooled engine |
-
1988
- 1988-06-10 JP JP14172688A patent/JPH01313686A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419686U (en) * | 1990-06-05 | 1992-02-19 | ||
| WO2005061900A1 (en) * | 2003-12-22 | 2005-07-07 | Mitsubishi Denki Kabushiki Kaisha | Screw compressor |
| CN100387843C (en) * | 2003-12-22 | 2008-05-14 | 三菱电机株式会社 | Scroll compressor |
| US7779822B2 (en) * | 2007-01-12 | 2010-08-24 | Gm Global Technology Operations, Inc. | Intake assembly with integral resonators |
| US20120020824A1 (en) * | 2010-07-20 | 2012-01-26 | Paul Xiubao Huang | Roots supercharger with a shunt pulsation trap |
| JP2017106342A (en) * | 2015-12-08 | 2017-06-15 | スズキ株式会社 | Water-cooled engine |
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